Antenna Installation - Cisco 4G-ANTM-OM-CM Manual

Cisco Indoor Swivel-mount Dipole Antenna (ANT-4G-DP-IN-TNC)
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Before you install an antenna, contact your Cisco account representative to explain which mounting method to use for the
size and type of antenna that you are about to install.
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Find someone to help you—installing an antenna is often a two-person job.
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Select your installation site with safety, as well as performance, in mind. Remember that electric power lines and phone
lines look alike. For your safety, assume that any overhead line can kill you.
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Contact your electric power company. Tell them your plans and ask them to come look at your proposed installation.
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Plan your installation carefully and completely before you begin. Each person involved in an installation should be assigned
to a specific task, and should know what to do and when to do it. One person should be in charge of the operation to issue
instructions and watch for signs of trouble.
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When installing your antenna, follow these guidelines:
— Do not use a metal ladder.
— Do not work on a wet or windy day.
— Do dress properly—wear shoes with rubber soles and heels, rubber gloves, and a long-sleeved shirt or jacket.
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If the assembly starts to drop, move away from it and let it fall. Because the antenna, mast, cable, and metal guy wires are
all excellent conductors of electrical current, even the slightest touch of any of these parts to a power line completes an
electrical path through the antenna and the installer.
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If any part of the antenna system should come in contact with a power line, do not touch it or try to remove it yourself. Call
your local power company to have it removed safely.
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If an accident should occur with the power lines, call for qualified emergency help immediately.

Antenna Installation

This antenna is designed to be mounted directly to the access point. For information about orienting the dipole antenna, see
the hardware installation guide for your access point.
In addition to antenna orientation, wireless access point installation location with respect to all wireless clients plays a significant
role in determining overall network performance. Clients at the furthest coverage points might have 10% to 50% of the
bandwidth of clients close to it. Wireless network coverage in one area or location might need to be lowered to improve the
performance of other clients.
Because antennas transmit and receive radio signals, their performance can be adversely affected by the surrounding
environment including distance between access point and client, physical obstructions, or radio frequency (RF) interference.
Follow these guidelines to ensure the best possible performance:
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Wherever possible, mount the AP HWIC and antenna where the wireless devices would be within sight and avoid physical
obstructions. Barriers along the line of sight between client and access point will degrade the wireless radio signals. AP
HWICs and antennas can be installed above floor level in office environments or near the ceiling for better performance
since most obstructions tend to be near floor level.
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The density of the materials used in a building's construction determines the number of walls the signal must pass through
and still maintain adequate coverage. Consider the following before choosing the location to install your antenna:
— Paper and vinyl walls have very little effect on signal penetration.
— Solid and precast concrete walls limit signal penetration to one or two walls without degrading coverage.
— Concrete and wood block walls limit signal penetration to three or four walls.
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